1. A shopper pushes a 7.2- k g shopping cart up a 13 ? incline, as shown in the

Question

1. A shopper pushes a 7.2-kg shopping cart up a 13 ?incline, as shown in the figure

a) Find the magnitude of the horizontal force,

2.Two crewmen pull a raft through a lock, as shown in the figure(Figure 1) . One crewman pulls with a force of 130

N at an angle of 34 ? relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45 ? .

a) With what force should the second crewman pull so that the net force of the two crewmen is in the forward direction?

3.IP Find the normal force exerted on a 2.5

Explanation / Answer

1. Fcos13 - 7.2gsin13 = 7.2 x 1.60

F =28.11 N

2. Fcos45 = 130cos34

F =152.42 N m,ore than that

3. N = mgcos34 = 20.31 N

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